/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
    
    --gradient-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: all var(--transition-normal);
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    transform: scale(1.1);
    pointer-events: none;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

.loading-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: white;
    width: 0;
    animation: loadingProgress 2s ease-out forwards;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes loadingProgress {
    0% { width: 0; }
    100% { width: 100%; }
}

/* App Container */
.app-container {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.app-container.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
.app-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.logo-text h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.logo-text p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle, .export-btn {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.theme-toggle:hover, .export-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

/* Dashboard Stats */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-today .stat-icon { background: var(--gradient-primary); }
.stat-month .stat-icon { background: var(--gradient-secondary); }
.stat-earnings .stat-icon { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.stat-rate .stat-icon { background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%); }

.stat-info h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-header h2 i {
    color: var(--primary-color);
}

.section-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Input Section */
.input-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
}

.rate-setting {
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-group label i {
    color: var(--primary-color);
}

.input-with-action {
    display: flex;
    gap: var(--spacing-md);
    align-items: stretch;
}

.form-input, #hourlyRate {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-input:focus, #hourlyRate:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
    transform: translateY(-1px);
}

.form-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-lg);
    align-items: end;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-family: inherit;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-add {
    white-space: nowrap;
    font-size: 1rem;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.quick-add-btn, .toggle-view-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.quick-add-btn:hover, .toggle-view-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.clear-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--danger-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.clear-btn:hover {
    background: var(--danger-color);
    color: white;
    transform: scale(1.05);
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    font-family: inherit;
}

/* Time Entries */
.entries-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.time-entry {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
    animation: slideIn 0.3s ease;
}

.time-entry:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.entry-info {
    flex: 1;
}

.entry-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.entry-time {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.entry-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.delete-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--danger-color);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.delete-btn:hover {
    background: #dc2626;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Monthly Breakdown */
.monthly-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.month-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.month-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-secondary);
}

.month-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.month-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.month-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.month-salary {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-color);
}

.month-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.stat-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
}

.stat-item .stat-value {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-item span:last-child {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 300px;
    animation: toastSlide 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--secondary-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--accent-color);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast.success .toast-icon {
    color: var(--secondary-color);
}

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    color: var(--accent-color);
}

.toast-message {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.shake {
    animation: shake 0.3s ease-in-out;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        padding: var(--spacing-xl) var(--spacing-lg);
        gap: var(--spacing-xl);
    }
    
    .dashboard-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .monthly-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .logo-section {
        align-self: stretch;
    }
    
    .header-actions {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .main-content {
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .section-actions {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .input-with-action {
        flex-direction: column;
    }
    
    .time-entry {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .entry-actions {
        align-self: stretch;
        justify-content: flex-end;
    }
    
    .month-stats {
        grid-template-columns: 1fr;
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        top: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-2xl: 2rem;
        --spacing-xl: 1.5rem;
        --spacing-lg: 1rem;
    }
    
    .logo-text h1 {
        font-size: 1.5rem;
    }
    
    .logo-text p {
        font-size: 0.75rem;
    }
    
    .input-card {
        padding: var(--spacing-xl);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.25rem;
    }
    
    .export-btn span {
        display: none;
    }
}

/* Print Styles */
@media print {
    .app-header,
    .input-section,
    .section-actions,
    .entry-actions,
    .toast-container {
        display: none !important;
    }
    
    .main-content {
        max-width: none;
        padding: 0;
    }
    
    .stat-card,
    .month-card,
    .time-entry {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Focus Styles for Accessibility */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-screen {
        display: none;
    }
    
    .app-container {
        opacity: 1;
        transform: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-muted: #333333;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-muted: #cccccc;
    }
}

/* Additional Utility Classes */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.3s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Interactive Elements Enhancement */
.btn:active {
    transform: scale(0.98);
}

.stat-card:active {
    transform: translateY(-2px) scale(0.98);
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Selection Styling */
::selection {
    background: rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
}

/* Focus Ring Enhancement */
.focus-ring:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

/* Advanced Hover Effects */
.hover-lift:hover {
    transform: translateY(-4px);
    transition: transform var(--transition-normal);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
    transition: box-shadow var(--transition-normal);
}

/* Status Indicators */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: var(--spacing-sm);
}

.status-dot.success {
    background: var(--secondary-color);
}

.status-dot.warning {
    background: var(--accent-color);
}

.status-dot.error {
    background: var(--danger-color);
}

/* Card Variants */
.card-elevated {
    box-shadow: var(--shadow-lg);
    transform: translateY(0);
    transition: all var(--transition-normal);
}

.card-elevated:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.card-outlined {
    border: 2px solid var(--border-color);
    background: var(--bg-card);
}

.card-gradient {
    background: var(--gradient-primary);
    color: white;
}

/* Typography Enhancements */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Advanced Grid Layouts */
.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

/* Flex Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-sm {
    gap: var(--spacing-sm);
}

.gap-md {
    gap: var(--spacing-md);
}

.gap-lg {
    gap: var(--spacing-lg);
}

/* Spacing Utilities */
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* Border Utilities */
.border { border: 1px solid var(--border-color); }
.border-2 { border: 2px solid var(--border-color); }
.border-primary { border-color: var(--primary-color); }
.border-secondary { border-color: var(--secondary-color); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: 50%; }

/* Background Utilities */
.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-card { background: var(--bg-card); }
.bg-gradient { background: var(--gradient-primary); }

/* Text Utilities */
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

/* Display Utilities */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Z-index Utilities */
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-none { box-shadow: none; }

/* Transition Utilities */
.transition-fast { transition: all var(--transition-fast); }
.transition-normal { transition: all var(--transition-normal); }
.transition-slow { transition: all var(--transition-slow); }

/* Dark Theme Specific Enhancements */
[data-theme="dark"] {
    color-scheme: dark;
}

[data-theme="dark"] .loading::after {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

[data-theme="dark"] ::selection {
    background: rgba(99, 102, 241, 0.3);
}

/* Performance Optimizations */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Final Responsive Adjustments */
@media (max-width: 360px) {
    :root {
        --spacing-2xl: 1.5rem;
        --spacing-xl: 1rem;
    }
    
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo-text h1 {
        font-size: 1.25rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
}